Definition: You are given a question on moral disputes. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input:  Which of the following is, according to the introduction to chapter 8, typically defined as the act or practice of killing or allowing someone to die?
(A)murder (B)ethical killing (C)suicide (D)euthanasia

D